Variety reports that 'The Flash 2' is signed, sealed and delivered -- and on standby -- courtesy of "Aquaman" screenwriter David Leslie Johnson-McGoldrick ... noting Warner is inclined to use it if a sequel is greenlit, which we won't know until after "The Flash" debuts.

The outlet also goes on to say that Johnson-McGoldrick's script features continued cameos from Michael Keaton's Batman and Sasha Calle's Supergirl ... who are both in the upcoming flick. The word of mouth for 'Flash,' which is coming out in a couple weeks, is at peak levels right now ... with many hyping it as one of the greatest superhero movies of all time.

As for Ezra ... well, the director of "The Flash," Andy Muschietti, has already gone on the record to say he would recast them if a sequel was in the cards ... praising Ezra's work as Barry Allen as a one-of-a-kind performance that's made for them in any future installments.

The problem -- at least from some fans' POV -- is that Ezra is very problematic ... on account of all the crimes/misdeeds they've been alleged of carrying out over the past few years.

Just to name a few ... alleged assault, alleged grooming, alleged breaking and entering, alleged harassment ... among other things. Several of these incidents have resulted in arrests -- and wild police body cam footage too -- as well as a plea deal for at least one of these.

Of course, Ezra has also apologized for their erratic behavior ... and went on to cite mental health issues, as well as saying they'd seek the professional help they need to get better.

That ended up being good enough for Warner, which opted not to recast Ezra and move forward with the release of "The Flash" as is. Interestingly, Variety also reports that Ezra is going to skip all of the press ahead of the movie ... and will only make a brief appearance at the Los Angeles premiere the week of. Press for this movie, in general, has been virtually non-existent and it seems Warner will continue with that strategy ... opting instead for a bunch of ad buys and other promo, like screenings ... of which there's been several now.

Despite Ezra ducking their head and laying low ahead of "The Flash," the movie is projected to do pretty well at the box office -- at the moment, it's on track for a $75 mil opening.

Some are crying foul over Ezra getting this pass -- not to mention an almost guaranteed sequel -- and feel like they're being afforded an opportunity others who've been accused of wrongdoing, like Jonathan Majors, aren't enjoying. Granted, JM is with a different studio and hasn't lost his Marvel job just yet ... plus, his case is a bit different than Ezra's sitch.